Gate.



H. M. WOOD.

GATE.

APPLICATION FILED SEPT.17. 1914.

Patented Mar. 2, 1915.

3 SHEETS"SHBET 1.

H- M, WOOD Illini mail.

r Uv attained? MORRIS PETERS CD.. PHOTG-LITHO.. WASHINGTON. D, CA

H. M. WOOD.

GATE.v

APPLICATION FILED s112117, 1914. l 9 i: 91,9

Patented Mar. 2, 1915.

3 SHBETS-SHEBT 2.

H. M. WOOD.

GATE.

APPLICATION FILED SEPTJ?, 1914.

Patented Mar. 2, 1915.

mgm.

3 SHEETS-SHEET 3.

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THE NORRIS PETERS CO., PHOTO-LITHO., WSHINGUN, D4 C ties of the cranks?) have pivotally engaged therewith'the pitmen 4 which in turn are pivotally engaged with the inner extremities of the gate arms or bars of conventional construction and supported for rocking movement by the upper extremities of the standards 6. By this arrangement, it will be readily perceived that the gate arms or bars 5 will be caused to move in unison and in the same direction. 'i

The engagement between one of the arms or bars 5 and itsV coacting standard is, as herein disclosed, created through the medium Vof a pivot pin 7 disposed through the upper bifurcated extremity 8 of the standard and through a longitudinally disposed slot 9 produced in the arm' or bar. A rod 10 is pivota.lly engaged with the tail of the bar or arm 5 and operatively engaged with the piston V11 adapted for reciprocating movement within the vertically disposed cylinder 12 operatively supported by the standard 6.

In a manner to be hereinafter set forth, the piston 11 is caused to move upwardly under the tension of a iiuid, preferably compressed air, in order to cause the gate bars or arms to assume an operative or horizontal position and as such piston moves upwardly the same is held against retrograde movement under the influence of a` spring pressed pawl 111 carried by thev adjacent standard 6 and engageable with the rack Y A face 15produced on the rod 10. Movement Vto the piston 11 in the opposite direction and in order to move the arms or bars into an inoperative or open position is created through the medium `of an expansible memberA 16, herein disclosedA as a coil spring of requisite tension, surrounding the rod 10 and interposed Vbetween the piston 11 and the upper head 17 of the cylinder 12. Y

In communication with the cylinder 12 through the lower head 18thereof is a pipe line 19 extending a predetermined distance along the track-way and having in communication therewith the compressors C. As each ofthev compressors C is of identical construction, it is thought that a detailed description of one will suiiice for the purposesof disclosure.

Asherein embodied,` each compressor C comprises an elongated basemeinber 2O suiti l ably anchored to the ties 'I ofthe track-way j is believed to be self-evident.

j reciprocation within the cylinder v21 is a pisor any other suitable support and positioned in close proximity to the outer side of one of the rails It and suitably connected with suoliY base member is a cylinder 21 in communication with the pipe line 19-through themedium of the branch pipe 22 in which is interposedA a check valve 23 of conventional construction and for a purpose Vwhich Mounted for ton 24operatively connected with a rod 25 projecting a predetermined distance exteriorly of the cylinder and has its outer extremity operatively engaged with a block 26 mounted for sliding movement within the track-way 27 produced in one end portion of the'base plate 20. Intel-posed between the block 26 and the adjacent head 28 of the cylinder 21 and surrounding the rod 25 is an expansible member 29 herein disclosed as a coil spring which serves to normally hold the piston in retracted adjustment. r1`he upper extremity of the block 26 has pivotally engaged therewith around a horizontal axis a dog 30 normally maintained in vertical position and in engagement with the shoulder or stop 31 of the block through the medium of the retractable member 32 herein set forth as al coil spring anchored at one extremity to the dog and at its opposite extremity to the block, as is believed to be clearly shown in the accompanying drawings. The rolling stock or preferably the locomotive indicated in fragment as at L is provided with a depending member 33 pivotally engaged therewith and maintained in normal vertical position through the medium of the retractable member 3% herein disclosed as a coil spring possessing the requisite tension. 'The member is adapted to strike the dog 30 and thus under the impact of the tra-in force the piston 24 inwardly and thus cause suiiicient compression of air as to result in an upward movement of the'rod 10 to impart a downward movement to the gate arms or bars. In practice, it is my purpose to employ a sufiicient number of compressors C as to result in causing such gate bars or arms to assume an operative or closed position. I find it of advantage to have this done intermittently so that should any persons or teams be passing over the track-way at the time the first compressor is engaged, they will have ample opportunity to clear the track.

In order to protect the rod 25 from the action of the elements, I find it desirable to inclose the forward end portion of the base plate 20 with the hood or casing 35 having produced in its upper portion the longitudinal slot 36 to permit an unobstructed movement of the block 26, and in order that such slot 36 may be closed during the time the block is in its normal position, I provide the slide 37 secured at one end to the block and having its opposite extremity directed through the guide 33 carried by the casing 35, said slide being of a length substantially equal to the length of the slot and of a width to overlie the marginal portions of the slot in a manner and for a purpose which is believed to be clearly apparent to those skilled in the art to which my present invention appertains.

Rotatably supported by the standard 6 provided with the cylinder 12 is a vertical aisance shaft y39 provided at its upper extremity with a linger or `lip 40'adaptedto engage a linger or pinl 41 carriedk by ther dog` 14 in erden te release the dogfrom thestein -in order that the samemay return to its normal the locomotiveL or the Ilike' wherebyit will be perceived thatas' soon as the locomotive has crossed the road-way, therarms or'ba'rs 5 will be permitted tov automatically i assume Ian inoperative or vertical position.

To prevent the dog 14'- fronrengaging the ratchet face 15 of the rod! 10 vduring the downward movement of 'said rod, I find itof advantageto pivotally secure tof the upper head 17 of the-cylinder'lQ thel pawl 43 of such av length as toengage the inner edge ef the dog 14 when the same is retracted and thus preventit from coming in contact with Vther-ack face. 15. rllhe movement of the pawl 43 into such position relative to the pawl 14 is created, as herein disclosed, throughthe medium ofthe retractable member 44, herein disclosed as al coil spring, having one extremity suitably anchored to thel pawl and its opposite extremity to the head 17.' Projecting upwardly fromthe pawl 43 isa cam member `45 with which is adapted to engage a projection 46 projecting laterally from therod 10 ata predetermined point thereon whereby it-.will be perceived that just before the rodreaches the limit of its downward movement, suchr projection will engage the cam and move the pawl out of engagement with the/dog so that such dog may properlyA engage the ratchetface.

I also find itof advantage to interpose in the pipe `line 19k a puppet" valve 47 having in communication therewith a whistle 48. By this arrangement, it will be perceived that upon excess tension within the line 19, the puppet valve will be caused to rise which will result in thev sounding ofthe whistle'. The puppet valve is also provided with the restricted openings or vents 49 to permit reduction of the pressure within the cylinder v 12 in order to permit an unhampered action of the expansible member 16.

In order that an audible alarm or signal may be sounded during the movement of the gate bars or arms 5, I find it of advantage to operatively support by one of the standards 6 a bell 50 adapted to be operated by the gear train 51, one of said gears being fixed to the pivot 52 between the standard 6 and the coacting arm or bar 5. I also find it of advantage to have the pivotal connection between the rod 10 and its coacting bar or arm 5'and the adjacent pitman 4 created through the medium of the common pin 53.

In order to maintain the arm 42 normally ina position to be engaged by the member 33, I provide the shaft 89 with a projection 5.4.to which 'is anchored an extremity of a retractable member 55, herein disclosed as a ccilfspring, the opposite extremity whereof being' suitably anchored to the adjacent standard 6. As is believed to be self-evid'cnt` the mov-ement imparted to the shaft under the influence of this expansible meml'aer 55 is limited by contact of the finger or lip 40-with the finger or pin 41.

From the foregoing description, it is thought? to be obvious that a gate constructed in. accordance with my invention is of an extremelyl simple and comparatively inexpensive natureA and is particularly well adapted for use by reason of the convenience andifacility with which it may be assembled, andv it will also be obvious that my invention is susceptible of some change and modilication without material departure from the principles and spirit thereof and for this reasoniI do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying cut my invention in practice.

I. claim:

1.` In combination with a gate, an operating mechanism therefor comprising a rod operatively engaged therewith, fluid means for imparting movement to the rod in one direction,means for imparting movement to therod in an opposite direction, means normally in engagement with the rod for vholding the same against` action under the influence of the second means, means for causing the holding means to become inoperative,

and means for maintaining said holding means inoperative until the same has traveled a predetermined distance under the inliuence of the second named means.

2. In combination with a gate, an operating means therefor comprising a rod operativelyengaged withthe gate and provided with a rack, a pawl coacting with the rack and normally in engagement therewith, means for adjusting the pawl out of engagementl with the raclr, automatic means engageable with the pawl when disengaged from the rack for maintaining said pawl in its inoperative position, and means for disengaging said last named means from the pawl upon movement of the rod a predetermined distance in one direction.

3. In combination with a gate, an operating means therefor comprising a rod operatively engaged with the gate and provided with a rack, a pawl coacting with the rack and normally in engagement therewith, means for adjusting the pawl out of engagement with the rack, automatic means engageable with the pawl when disengaged from the rack for maintaining said pawl in its inoperative position, and a spring operated pawl adapted to engage the dog when the same is disengaged from the rack for holding the dog in inoperative position.

4L. ln combination with a gate, an operating means therefor comprising a rod operatively engaged with the gate and provided with a rack, a pawl coacting with the rack and normally in engagement therewith, means for adjusting the pawl out of engagement with the rack, automatic means engageable with the pawl Vwhen disengaged from the rack or maintaining said pawl in its inoperative position, a spring operated pavvl adapted to engage the dog when the same is disengaged from the'rack `for holding the dog inY inoperative position, a cani carried by the pawl, and means carried by Y the rod coacting` with the cam for disengaging the pawl .from the dog upon movement of the rod a predetermined distance in one direction.

5. In combination witha gate, an operating means therefor comprising a rod operatively engaged with the gate and provided Ywith a rack, a pawl coacting with the raeliand normally in engagement therewith, means for adjusting the pawl out or' engagement with the rack, automatic means engageable with the pawl when disengaged from the rack for maintaining said pawl in its inoperative position, a spring operated pawl adapted to env-age the dog when the same vis disengaged from the rack for holding the dog in inoperativeposition, and a.V shaft mounted for axial rotation providedV gagement with the rack, automatic means engageable with the pawl when disengaged lrOmthe rack for maintaining said pawl in its inoperative position, a spring operated pawl adapted to engage the dog when the saine is disengaged from the rack for holding the dog in inoperative position, a shaft mounted for axial rotation provided with means for rotating the same and having an extension adapted to engage the pawl, and means for maintaining the extension of the shaft normally in engagement with the pawl.

7. in combination with a gate, an operating mechanism comprising av cylinder, a piston within the cylinder, a rod operatively engaged with the piston and the gate, a pipe line in communication with the cylinder, a compressor in communication with the pipe line, said compressor comprising a cylinder, a piston therein, a stem connected with the piston and projecting exteriorly of the cyliiider, a sliding block connected to the projected portion of the stein, and an expansible member interposed between the cylinder and block.

8. ln combination with a gate, an operating mechanism comprising a cylinder, a piston within the cylinder, a rod operatively engaged with the piston and the gate, a pipe line in communication with the cylinder, a compressor in communication with the pipe line, said compressor comprising a cylinder, a piston therein, a stem connected with the piston and projecting exteriorly of the cylinder, a sliding block'connected to the provjected portion of the stem, an expansible Vmember interposed between the cylinder and block, a protecting casing for the projected portion of the stem provided with an elongated slot through which the head projects, and a slide connected with the block and movable therewith and overlying the slot.

ln testimony whereof l. hereunto aiiix my signature in the presence of two witnesses. HALBERT M. WOOD. Witnesses E. T. Lown, Sr., JAMES A.. lWILLIAMS.

. Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.Y 

